Vertically-adjustable chair



Dec; 6, 1927.-

E. BERNINGHAUS VERTICALLY ADJUSTABLE CHAIR Filed April 1'7 1923 'IIIIII.UIIIIII.

IIII'II \\\n *NN N attonuq Patented Dec. 6, 1927.

PATENT OFFICE.

EUGENE BERNINGHAUS, or CINCINNATI, OHIO.

VERTICALLY-ADJUSTABLE CHAIR.

Application filed April 17, 1923. Serial No. 632,665.

My invention relates to improvements in vertically adjustable chairs.One of its objects is to house and protect the oilcoated surfaces of avertically adjustable chair to keep the oil coated surfaces clean andfree from dust, grit and other foreign substances suspended in the airorliable to be brought into contact with such oil coated surfaces,

and which tends to collect uponand adhere to such surfaces. Anotherobject is tohouse and conceal from view the oil coated or machinefinished surfaces of a vertically adjustable chair, and to provide anexposed surface over suchoil coated or machine fin ished parts adaptedto be aseptically treatedor kept clean in substantially the same mannerthat other surfaces of the chair are customarily treated. Another objectis to' provide an improved housing and protecting apparatus, adapted tobe conveniently assembled or taken apart as required. Another object isto provide an improved housing and protecting apparatus which is sim-vple, efficient and noiseless in operation. My improved apparatus alsocomprises certain details, and combination and arrangement ofcomponents, all of which will be fully set forth in the description. ofthe accompanying drawings, in which; 7

Fig. 1 1s a side elevation, partly 1n1central vertical section, of avertically adjustable chair embodying my invention.

Fig. 2, is a perspective view of the pedestal or plunger of said chairdetached.

Fig. 3, is a perspective view 'of'the housing or protecting sleevedetached.

Fig. 4,.isavertical section through the baseand pedestal of'a verticallyadjustable chair showinga modification of Fig- 1.

Fig. 5, is perspective view of a detached flexible gasketv employed inFig. 4:.

The accompanying drawings illustrate the preferred embodiments of myinvention in igs. 1, 2, and 3 of which I have illustrated myimprovements as applied to a hydrau lically vertically adjustable chair,such for: Instance as a barbers chair or surgical chair.

The chair may however' be vertically adjustable byother means,asforfinstance by screw orratchet feed mechanism, within the score 'my.invea i T As illustrated a chair seat 15, a chair back 16,'chair arms17, and a foot rest 18 are connected together in the usual manner andare mounted upon a pedestal or hydraulic plunger 19, to the upper end ofwhich the plunger as maybe required to-eleVate 'or lower the plungerwithin the cylinder. A liquid pump piston 23 is adapted to berec'iprocated within the interior ofthe plunger 19 to pump the liquidinto the'cylinder belOW the plunger When required to elevate the plungerand chair seat carried thereby. A

crank shaft 24 is journaled in the upper portion of theplunger andoperatively connected by means of a connecting rod 25 with the piston23. A hand lever 26 is employed to reciprocate the crank shaft, and alsowhen moved to other positions to control the flow of liquid from thecylinder back tothe interior of the plunger, and also to apply a brakemechanism to lock the plunger to its adjusted position, which of knowntypes.

At the upper end of the cylindrical section 201 provide an annularshoulder or ofiset27, and above said shoulder 27 a rectangular section28 forming a journal support for the crank shaft, and also a housingforthe, upper end ofthe connecting rod. At theupper end of therectangular section 28 is an annular flange 29 by means of which thepedestal or plunger 19 is bolted or other.- wise rigidly attached mumchair seat.

I Ordinarily that portion of the pedestal 19 projecting above the upperend of the cylinder, whatever type of seat elevating means maybeemployed, would be exposed to view and would havemachine finishedsurfaces 7 apparatus may be and such machine finished surfaces wouldordinarily be coated with lubricating 011, and therefore presentunsanitary appear- .ances, and exposing surfaces tending'to attract andhold dust, grit and s milar substances taken from the atn'iosphere. Theaeeumulation oil? dustand grit upon the maohined surfaces is detrimentalto the opera tion of the mechanism and unsightly as well as having anunsanitary appearance.

In order to present a tinished and pleasing appearance, and a sanitaryappearaiu'e. and at the same time to protect the unurhined and oileoated surfaces I n'ovide a eylin drieal tubular housing member 30, theupper end of which fits snugly over the exterior of the annular shoulderBland against the under face oi the reetangular seetion A pair of earsEll projeet upwardly from the upper edge of the housing member 30 along!side of opposite fat-es of said l'ot'lflllj tllltll' section 28. Therectangular section 18 is provided with dogs or studs 32 preteraltilvhaving inclined outer ends, and the ears Ell are provided withperforations to reeeive and interlock with said studs 32 to hold thehousing member 30 rigidly but detaehahly in place upon and relative tothe pedestal 19. The ears Ell. are snflieiently resilient to enable saidears to be spread apart. by the inclined ends of the studs 32 until saidstuds reach a position opposite the perforations in said ears 3], whenthe ears Ell spring toward each other and hug the fares oi thereetangular section 28 with the studs 32 projecting into or through theperforations in said ears 31. In the event that it becomes neces ary todetach the housing 30 from the pedestal 19, wedges are inserted betweenthe ears 31 and the :taees of the sect-ion until the studs 32 are freefrom the perforations of said ears whereupon the housing and pedestalare separatcal. The lower end of the housing member ill projerisdownwardly and teleseopieally enters andv moves with in the annularspace 34- between the eylinder l2 and an annular flange 35 projectingupwardly "from the base 5-36. The flange 35 may be formed integral withthe eylinder Q3 and base 36, but is preferably formed separately andbolted or otherwise attached to the base. A polished metal annularfaring member 37 is preferably enniloyed as an m'naniental finish, andto eoneeal the joint between the base 36 and flange 35. A polished sheetmetal annular roller 38 is preferably one ployed titted over the upperend of flange as to make a close joint and finished appea anee betweenthe flange 35 and the housing member 30. The exter or tare oi thehousing member 30 is prei'erably finished in white fused enamel, andalso the exter or fare of the flange 35 to correspond with a similarfinish applied to tllfifitflt frame -39 and to the chair arms 17. Thehousingmenn her 30 thus has the appearance of an up- 'ard extension ofthe flange 35, and said housing 30 moves telesyeopieally within tl eflange i lo as the pedestal it) is raised or lowered, with an invisiblejoint between said housing .ltl and flange 3:"). The chair thus presentsa sanitary appearance throughout, the enameled :l aees may be eleanedthrough the use of strong ehemieals without injury to said enameledfaces, and the machined faces are prot-eettal from injury, from dirt,grit or chemicals.

in the inmlititaition Figs. 4- and 5 I have illustrated an annulargasket 10 oli rubber, paper fiber or other similar nonmetallio materialof slightly resilient nature interposed between the upper edge of thehousinginember ill) and the flange 27 and lower face of the reetangularsettion :28. to yieldingly and noiselessly hold the ears ill and studs32 in locked engagement.

The ap iiaratns herein shown and de arribed is capable of eoi'isiderahlemoditiealion without departing from the spirit of my invention.

lVhat I claim is: e j

1. A ehair comprising a ehair base having an upwardly extending chairpedestal supporting member, an annular flange project ing upwardly:ti'otnjsaid base about said pedestal supporting member to provide anannular recess between said pedestal supg porting member and saidflange, a chair pedestal "vertically adjustable upon and relative tosaid pedestal supporting ineinl'ier, said pedestal being ]')1.0Vl(l0(lat its upper end with an enlarged head and near its upper end with aspacing shoulder, looking projeetions extending outwardly from theenlarged head oi said pedestal, a chair seat mounted upon said pedestaland vertically adjustable with said pedestal, and a tubular pedestalhousing provided with iertorated ears projeetii'ig upwardly andoutwardly from the upper end ot said i'iedestal housing to en gage sa dlock ng projeetions to look said tubular housing with its upper endrigidly against the shoulder of said pedestal and with said tubularhousing spaeed from said pedestal and in po ition to more verticallyinto and out of lheanuula r reeess oi the base as the pede al adjustedrertieally relative to said base.

ehair eomprising a chair base lHIV" irg an upwardly extending ehairpedestal rupporting member, an annular flange projenting upwardly fromsaid base about uaid pedestal supporting member to provide an annularrecess between said pedestal supporting member and said flange, a chairpedestal vertically adjustable upon and relative to said, pedestalsupporting member, said pedestal being provided near its upper end withmeans to spare a tubular housing away from said pedestal, a shouldernear the up per end of said pedestal, and loekingprojet'tions extendingoutwardly from the eularged head of said pedestal, a chair seat mountedupon said pedestal and vertically bular housing inposition to movevertically adjustable with said pedestal, and a tubular into and out ofthe annular recess of the pedestal housing provided with upwardlybaseras the pedestal is adjusted vertically 1 directed yieldingperforated ears to yieldrelative to said base.

ingly engage over said locking projections In testimony whereof I haveaffixed my to lock said tubular housing rigidly against signature;

the shoulder of said pedestal With said tu- EUGENE BERNINGHAUS.

